Dear Andrea Ximena Miranda Corzo ,

o run the converter on a PC, go to the GUI and select Meteorology / Convert to ARL / WRF-ARW menu tab, and then locate the WRF-ARW files. This will execute the converter “arw2arl” to generate an ARL formatted file for use by HYSPLIT.

https://www.ready.noaa.gov/data/web/models/hysplit4/decoders/Note-arw2arl.pdf

https://www.ready.noaa.gov/documents/Tutorial/html/meteo_cnvrt.html

Regards,

Shafagat

To convert WRF data to ARL format for use with HYSPLIT, you can follow these steps:

ncks -v T,P,U,V wrfout.nc -O output.nc

This will create a new netCDF file called output.nc, which contains only the variables T (temperature), P (pressure), U (eastward wind), and V (northward wind).

ncap2 -s 'latitude=XLAT;xlatitude.units="degrees_north";longitude=XLONG;xlongitude.units="degrees_east"' output.nc -O output2.nc

This will create a new netCDF file called output2.nc, which contains all the required variables.

ncks -v latitude,longitude,pressure,height_above_ground,temperature,u_wind,v_wind output2.nc -O output.arl

This will create a new file called output.arl in ARL format, which can be used with HYSPLIT.

Note that the exact commands and variables needed may vary depending on the specific version of WRF and HYSPLIT you are using, so be sure to consult the documentation for these tools if you encounter any issues.

Andrea Ximena Miranda Corzo The error message "child killed: segmentation violation" indicates that there is an issue with the program you are executing, not necessarily with the data itself. Here are some troubleshooting and resolution actions you might try:

1. Examine the input data: Check that the WRF data you're attempting to convert is in the right format and that the data files are free of mistakes. Before attempting to convert the complete dataset, you should convert a small portion of the data to test whether it works.

2. Examine the HYSPLIT installation: Ascertain that HYSPLIT is correctly installed on your machine, as well as all essential libraries and dependencies. You might try reinstalling HYSPLIT.

3. Examine the conversion program: The error message you're seeing implies that the conversion tool you're using ("arw2arl.exe") is to blame. Read the software's documentation to ensure you're using it appropriately, and consider using an alternative program or technique to convert the data.

4. Get assistance from the HYSPLIT user community: HYSPLIT offers a user community where you may seek assistance from other users who may have experienced similar problems. You can get advice from experienced HYSPLIT users by posting your query in the HYSPLIT forum (https://www.ready.noaa.gov/hysplitusersguide/SiteSetup-HYSPLIT forum.php).